The youngest Jonas Brother takes a b-day walk with his pup in Toluca Lake, Calif. Plus: Britney Spears, Gwyneth Paltrow, Lindsay Lohan and more

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JUST FOR LAUGHS

Though his movie's no laughing matter, Samuel L. Jackson yuks it up with pal Will Smith Monday at the New York City premiere of his thriller Lakeview Terrace. In it, Jackson plays an L.A. cop determined to force out the interracial couple (played by Kerry Washington and Patrick Wilson) who move next door to him.